Boiler



W. WAUDBY Nov. 8, 1938.

BOILER Filed Oct. 5, 1955 2 Sheets-Sheet l m. T. N E V m ATTORNEY.

INVENTOR.

2 Sheets-Sheet 2 BOILER 05 ATTORNEY.

NIMH

W. WAUDBY Filed Oct. 5, 1935 Nov. 8,

Patented Nov. 8, 1938 UNITED STATES BOILER Walter Waudby, Boulogne sur Seine, France, as-

signor to American Radiator Company,

New

York, N. Y., a corporation of New Jersey Application October In France 3 Claims.

Myinvention relates to improvements in heating apparatus, and the same has for its object to provide a simple, efficient and inexpensive means for conveniently converting a boiler originally designed for burning solid fuel into a boiler for burning liquid or gaseous fuel.

Further, said invention has for its object to provide a cast iron sectional boiler with a separate fuel receptacle or combustion chamber which may be readily applied to a boiler and fitted into the ordinary or usual fuel receptacle and combustion chamber forming part of the boiler.

Further, said invention has for its object to provide a sectional cast iron boiler with a sheet steel fuel receptacle and combustion chamber which may be readily applied to a boiler whereby to render the same capable of eiciently burning liquid or gaseous fuel.

Further, said invention has for its object to provide a boiler with a separate sheet metal fuel receptacle and combustion chamber which may be readily introduced through the fire door opening, or a specially provided opening in one end section of the boiler, and secured at its forward or outer end to, and be supported by said end section.

Further, said invention has for its object to provide a cast metal or other form of boiler with a separate sheet steel fuel receptacle and combustion chamber carrying at its forward or outer end an oil burner.

Further, said invention has for its object to provide a cast iron sectional boiler with a separate, double-walled fuel receptacle and combustion chamber which communicates with the main fuel receptacle and combustion chamber, and whose water-containing wall portions are connected toand communicate with the water spaces or passages of the cast iron boiler sections.

Further, said invention has for its object to provide a cast' iron sectional boiler, with a separate water backed steel or wrought iron fuel receptacle and combustion chamber, in order to protect the cast iron sectional boiler from the direct action of the fiame. The said separate combustion chamber being made of steel, is better able to withstand the severe stresses set up by the sudden heating and cooling, incidental to the operation of thermostatically controlled automatic burners, especially when burners are badly adjusted or regulated.

Further, said invention has for its object to provide a cast iron sectional boiler with a separate water backed steel fuel receptacle and combustion chamber lined with refractory material.

5, 1935, Serial No. 43,693 October 1l, 1934 The said refractory lining inside the combustion chamber radiates heat back to the flame, and maintains a very high combustion temperature and permits of the volume of the separate fuel receptacle and combustion chamber to be considerably smaller than the corresponding volume required in ordinary sectional boilers.

Other objects will in part be obvious and in part be pointed out hereinafter.

To the attainment of the aforesaid objects and ends my invention consists in the novel features of construction, and in the combination, connection and arrangement of parts hereinafter more fully described and then pointed out in the claims.

In the accompanying drawings- Figure l is a front elevation showing one form of boiler constructed according to, and embodying my said invention;

Fig. 2 is a central, longitudinal section on the line 2-2 of Fig. 1, and

Fig. 3 is a transverse section on the line 3-3 of Fig. 2, illustrating one form of means for movably supporting the inner or rear end of the separate fuel receptacle and combustion chamber.

In said drawings Ill designates a cast iron boiler of ordinary general construction designed for house heating purposes, enclosed by a jacket Ill, and comprising a series of vertical sections including a front section II, a back section I2, and a plurality of right and left half intermediate sections I3 communicatively connected at their upper and lower ends by nipples I4, I5, respectively. The back section I2 is provided at its lower edge with inlet or return ports I6 connected together by a manifold I1 communicating at IB with the return pipe I9 of the heating system, and both front section I I and back section I2 are provided at their upper portions with outlet or ow ports 20 connected by manifolds 2 I communicating at 22 with the flow pipe or riser 23 of the heating system.

The back section I2 is provided at its lower portion with smoke outlets 24 communicating with the main fuel receptacle and combustion chamber 25, and over said outlets 24 is secured a smoke hood 26 provided with a damper 26a.

The front section I2 is provided in its lower portion with a larger opening 21 over which is secured by bolts 2B a cover plate 29 having a circular opening 3i! therein in which is fitted the forward, projecting end of an inner fuel receptacle and combustion chamber which is preferably made in the form of a double-walled tubular member 3| formed of sheet steel. The said tubular member is provided near its forward end,

within the body of the boiler, and directly to the rear of the cover plate 29 with hollow extensions 32, 32 from which extend forwardly short pipe sections 33, 33a, respectively. To the lower pipe section 33L is connected one end of a return pipe 34 whose other ends extend downwardly and are connected to the front section Il of the boiler adjacent its lower end and communicate with the Water-space thereof, and to the upper pipe section 33 is connected one end of a flow pipe 34a whose other ends extend diagonally upward and are connected to said front section adjacent its upper end and likewise communicate with the water space of said front section 'I'he extreme forward, projecting end of the tubular member 3| is tapered at 35 to form a reduced opening 36 over which is fitted a plate 3'! carrying the nozzle 38, and directly associated parts of an oil burner 39 of any convenient or desired type.

The tubular member 3| is substantially coextensive in length with the interior of the boiler, and has the lower side of its inner end cut away to form an outlet 4U, the width and length of which may be increased or decreased in accordance with the type of the boiler to which the tubular member 3| is applied, or the purposes for which the boiler or furnace is to be used. The said outlet 40 permits the hot gases and products of combustion to pass from the interior of said tubular member 3| to the main fuel receptacle and combustion chamber 25 of the boiler, and over the outer sides of said tubular member 3| to and into the boiler iiues 4|, and finally to the smoke outlets 24.

The inner side of the tubular member 3| is provided with a refractory lining 42, and the inner side of the back section I2, is also provided with a facing of refractory material 43 to protect the same from the hot gases impinging thereon. Similar linings 44, 45 may be provided at the side walls and flow respectively, of the ash pit 46.

In order to movably support the inner end of the tubular member 3| during the periods of expansion and contraction thereof, the said end is provided upon its opposite under side portions with brackets 41 Whose lower ends are slidably supported upon angle iron rails 48 mounted upon the trunnions 49 of the boiler sections which are designed ordinarily and normally to support the grate bars employed for burning solid fuel.

The operation of the boiler will be obvious from the foregoing description.

It is to be noted that while I have illustrated and described my invention in connection with a sectional, cast iron boiler that the same is not limited thereto as the same is equally applicable to other forms of boilers.

For convenience of description the enclosed space 25 of the boiler which normally constitutes the fuel receptacle and combustion chamber of the boiler is specified in the specification and claims as the main fuel receptacle and combustion chamber" in order to distinguish the same from the tubular member 3| located therein, and in which combustion initially takes place.

Having thus described my said invention what I claim and desire to secure by Letters Patent is:

1. A sectional cast iron boiler including a front, a back and a plurality of intermediate sections communicatively connected and enclosing a main fuel receptacle and combustion chamber, a double-Walled, water-backed tubular sheet metal member constituting a separate fuel receptacle having its forward end supported by and extending through said front section, and its inner end free and extending into said main fuel receptacle and combustion chamber and terminating adjacent the said back section, said tubular member having its walls arranged in spaced relation to the interior of said main fuel receptacle and combustion chamber and communicating at its inner end therewith, means for yieldingly supporting the free inner end of said tubular member, and pipe sections connecting the waterbacked walls of said tubular member with the water-spaces of said front section.

2. A sectional cast :iron boiler including a front, a back and a plurality of intermediate sections communicatively connected and enclosing a main fuel receptacle and combustion chamber inwardly-extending projections on said intermediate sections, a double-walled, waterbacked tubular sheet metal member constituting a separate fuel receptacle having its forward end supported by and extending through said front section, and its inner end free and extending into said main fuel receptacle and combustion chamber and terminating adjacent the said back section, said tubular member having its walls arranged in spaced relation to the interior of said main fuel receptacle and combustion chamber and communicating at its inner end therewith, brackets secured to said tubular member adjacent to its inner end and movably supported upon said inwardly extending projections, and pipe sections connecting the Water-backed walls of said tubular member with the water-spaces of said front section.

3. A sectional heating apparatus of the character described including a double-walled, water-containing front section having an opening therethrough, a double-walled, Water-containing tubular member formed independently of the apparatus and disposed therein with its walls arranged in spaced relation to the inner walls of said apparatus; said tubular member having its forward end fixedly secured to and extending through the opening in said front section and its inner end provided in its let communicating with the interior of the apparatus: said inner end being disposed freely within the apparatus to permit of expansion and contraction, and flow and return pipes communicatively connecting the water-backed walls of said tubular Water-containing member at its forward end with the water space of said front section exteriorly thereof.

WALTER. WAUDBY.

under side with an out- 

